Need exhaust donut on a Sunday

[maplevalleyhammer]

Hi Guy's, I finally got around to installing the cat back system that I got from 5th scale racer last week (VERY nice stuff!), I need the 51mm exhaust seal ring to complete the install. The car is on my lift and it is Sunday.....dealer not open. Is there a compatible alternative or must I wait until tomorrow for my instant gratification

Thanks!

bp